Trump impeachment trial live updates: Biden says charge 'not in dispute' in 1st comments on acquittal

ABC News Congressional Correspondent Rachel Scott discussed how inside the chamber, nearly 15 seats of GOP senators were empty as Democratic House managers made their case against Trump.

"You have some Republicans who appear to already have their minds made up," Scott said.

In order to convict the former president, every Democratic senator and 17 Republicans would have to vote in favor. ABC News' Chief Legal Analyst Dan Abrams said that to change the minds of some Republican senators, it might require a witness who offers something "game-changing."

"Unless they've got a witness who can really offer something that is game-changing, something where someone says 'Donald Trump did or didn't do this on or around January 6th,' I don't think it's a real chance that that's going to happen," Abrams said.

The shattered glass panes on the doors to the U.S. Capitol Rotunda from the East Front -- known as the Columbus Doors -- were replaced with new glass Thursday after sustaining damage during the Jan. 6 riot, according to the Architect of the Capitol's office. 

"Moving forward, we are looking at options to display a collection of items from Jan. 6," spokesperson Laura Condeluci told ABC News. 

The shattered glass was in place during Biden's inauguration, and he could be seen walking past the panes. 

Lawmakers have discussed various ways to display the glass and other vestiges of the attack around the Capitol. 

"It would be a good thing to preserve some evidence of the destruction of the building. So that 150 years from now, as people tour the building, they'll say, 'Ah, this was where that insurrection occurred,'" Sen. Mitt Romney told ABC News recently.

-ABC News' Benjamin Siegel and Trish Turner

The Senate has returned from a roughly 35-minute break to resume arguments from the House impeachment managers.

David Schoen, a member of Trump's legal defense team, appeared on Fox News during the Senate trial. Schoen argued that it will not help healing to "show and reshow" the tragedy of the Jan. 6 riot.

"I have always said that this trial never should have happened, and if it happened, it should be as short as possible given the complete lack of evidence and the harm that this is causing to the American people," Schoen said.

As the House managers continue to lay out their allegations, Schoen offered an assessment of Trump's mood.

"The president is very upbeat, he has condemned the violence, and doesn't in any way want to be associated with what happened in this violent incident," Schoen said. "He has condemned the people involved and obviously quite offended at being tied into it."

Schoen told reporters that he thinks the House managers are "making a movie," saying they haven't "in any way" tied the riots to Trump.

-ABC News' Benjamin Siegel